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Principle of piezoelectric pressure sensor

Jul 20, 2018

The piezoelectric materials mainly used in piezoelectric pressure sensors include quartz, sodium potassium tartrate, and dihydrogen phosphate. Among them, quartz|silica is a kind of natural crystal. The piezoelectric effect is found in this crystal. The piezoelectric property always exists within a certain temperature range, but after the temperature exceeds this range, the piezoelectric property completely disappears. . High temperature is the so-called Curie point. Since the electric field changes little with the change of stress, that is, the piezoelectric coefficient is low, quartz is gradually replaced by other piezoelectric crystals. The piezoelectric effect is applied to polycrystals, such as piezoelectric ceramics, including barium titanate piezoelectric ceramics, PZT, tantalate-based piezoelectric ceramics, lead magnesium niobate piezoelectric ceramics, and the like.


      Temperature Compensated Water Pressure Sensor                     

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